am 05110234: Merge "Document Toolbar\'s vertical alignment strategy" into lmp-mr1-dev

 *     <li><em>A navigation button.</em> This may be an Up arrow, navigation menu toggle, close,

 *     collapse, done or another glyph of the app's choosing. This button should always be used

 *     to access other navigational destinations within the container of the Toolbar and

 *     its signified content or otherwise leave the current context signified by the Toolbar.</li>

 *     its signified content or otherwise leave the current context signified by the Toolbar.

 *     The navigation button is vertically aligned within the Toolbar's

 *     {@link android.R.styleable#View_minHeight minimum height}, if set.</li>

 *     <li><em>A branded logo image.</em> This may extend to the height of the bar and can be

 *     arbitrarily wide.</li>

 *     <li><em>A title and subtitle.</em> The title should be a signpost for the Toolbar's current

 *     end of the Toolbar offering a few

 *     <a href="http://developer.android.com/design/patterns/actionbar.html#ActionButtons">

 *     frequent, important or typical</a> actions along with an optional overflow menu for

 *         additional actions.</li>

 *     additional actions. Action buttons are vertically aligned within the Toolbar's

 *     {@link android.R.styleable#View_minHeight minimum height}, if set.</li>

 * </ul>

 * </p>

 *